Piston tool



May 12, 1925. v V A. S. HAISLIP PISTON TOOL FildMay 22. 1925 2 Sheets-Sheet 1 v Patented May 12, 1925.

UNITED STATES ALBERT s. HAISLIP, or nnnnnn'roiisnnne, VIRGINEAQ PISTON moot.

Application filed May as;

Be it known that I, ALBERT S. HAIs iP, a citizen -i the United States, residing at F i'ec'lericlrsburg, in the county of gpotsylvan'iaand Stateof Virginia, have invented new and useful linpi' oveinents in Piston Tools, of which the following is a specificall: H

The tool forining the subject matter of the present application for a patent has been designed especially fo the use of auton'iobile mechanics in working upon pistons, although not necessarily restricted to such use.

An important object of the invention is the provision of a novel and improved piston grip and support whereby the tool may be engaged in an ordinary vise Without necessitating the removal of the connecting rod fronnthe piston to be worked upon.

A; further object ofthe invention is to provide an improved ineans for beveling a piston ring receiving groove and aperturing the saine to prevent the pu'inping; oi: oil nto the cylinder of the engine when the piston is in use. j v

The invention also ha's for an. object to furnish a tool o'f this character 'which is very simple inconstruction;highly eiiicient in practical use, and which may be inanufactured and sold at a relatively small eost.

Other objects and advantages of my invention will become apparent as the deseriptio'n proceeds, and in order that the same may be better understood, reference is' had to the accompanying drawing forming a part of this specification.

In the drawing, a

Figure l is a perspective view illustrating a toolconstructed in accordance with my invention with a piston having an attached connecting rod positioned therein, the tool being; gripped between the jaws of a vise;

Fig". 2 is a plan view with the piston removed; p I V Fig. 3 is a sectional view on the line 3-3 of F ig. 2; I

Fig.4 is a detail showing]; the opera'tite position of a bit guiding means, and

Fig. 5 is broken view, partly in section illustrating the piston-revolving means.

Referring specifically to the drawing, wherein the preferred] embodiment of the invention is disclosed, and in which like reference characters have been used to designate like parts throughout the several j annulus I holding or a piston therein.

1923-. Serial No. 646,753.

views; numeral 5 denotes a contractibIe an nulus ofb "ass or other suitable alloy. The normally separated terminal portions 6.2111(1 7 of the annulus are provided with aligned transverse bores t'or loosely reoeivinga bolt 8,".the insertedend or which is threaded and is received in a nut 9 which is countersunk in the outer-side ofthe annulusterniinal The other end of the bolt 8 is formed with a cap 10 with a transverse cross pin 10 whei eby' the bolt may be rotated. The

inent thereto being'niade by means of bolts 13 passing through eyes 14 which are integrally projected from the annulus teron'the annulus 5'. Upon reference to, Figs. 1 and 3, it Will be noted that the under surface of the strap 12 "is provided with a depending projection l5 Wl'iereby the device 16 as shown in F ig. 1. By making the straps 12 of arc'uate form as, illustrated it is possible to'suppo'rt a piston 17 within the annulus while thetool is held in a vise Without necessitating the removal of the wrist pin 181With its depending connecting rod from the piston. i

Upon the upper surface of thestrap 12,

above the depending projection is formed; I a preferably integral block 20, the front or inner face of w hich is formed with an arcuate groove 21 for the reception of the The inner surf-ace of the end of the block 20 above the annulus receiving groove 21 will be areuate as shown in Fig. 2 so as to lie flush with the inner edge of the annulus 5 and not to interfere with the p The block 20 serves to reinforce the strap 12 at its pointn'inal 7 and a diametrically opposite'point maybe gripped between the jaws ot'a vise otattaehinent to a rise and the annulus receiving groove 21 thereof lends rigidity to the strap and aiiinulus connection, relieving strain from the eyes, it in the event of considerable pressure upon the diametri- -cally opposite and unsupported portion of the piston and bevel the lower edge of the bottommost ring receiving groove, drilling said beveled portion witha pluralityof apertures whereby any oilreaching the groove may be drained back to the crank case without passing above the groove.

,These operations heretofore have'consu'med considerable time, the usual method of securing the beveled edge requiring manual filing thereof or the use of a lathe. -The means whereby my tool may be made to perform the beveling and aperturing function will now be described.

The blocl: 20 is formed with a transverse threaded recess in its outer face as indicated at 22, this recess having communication with the inner face of the block above the groove 21 thereof, by means of asquared or other angular slot 23 of reduced dimensions, which latter is adapted to receive a slidable block 24. i

The'outerend of the block 24 is formed with a beveledcutting blade 25' as best shown in Fig. 3, the blade '25 being advanced to cutting engagement with the lower edge of the bottommost piston ring receiving groove by means of a screw 26, the head 27 of which is provided with a plurality of apertures 2'? for the insertion of a nail or pin for rotating the same. The screw 26 carries at its inner end a pin 28 of reduced dimensions whichis adapted to extend into the slot 23 for engagement with the rear end of the block 24. In order to take up any looseness of the block 24k in the slot 23, and to prevent displacement of the block when not in use, I have provided aset screw 29 which is inserted in' one side of the block 20 for engagement with the block 24-. q

The operation of bevelingthe edge of a ring receiving groove of}: piston maybe (ill threaded extension 32 whichpasses through the wrist pin 18 and is inserted in the ban! die 31. The cutting blade 25 may now be advanced by means ofthe screw, 26 to engagement with the bottom edge of the ring receiving groove of the piston. The upper projecting portion of the cutting blade'ex thereof.

tends above the edge of the groove operated upon, and elfectually maintains the piston upon the upper surface of the strap 12 with-, in the annulus for rotation thereon. The cutting blade 25v may be progressively fed against the edge of the groove during the" rotation of the piston until the edge has been suitably beveled as shown at 33 in. Fig. 1. In the event that pistons of various sizes are to be worked upon the lowermost grooves of which are atvarying distances from the'bottom edges thereof, I have provided the portion of the strap within -the annulus with steps 34 upon which such pistons may be placed as are of'reduced dlameter so as to bringthe' bottom edge of the lowermost cutting groove in the path of the beveled'cutting blade 25. "It will be obvious that piston rings or other suitable annular objects may be placed either upon the upper face of the strap or upon the steps 84 for the purpose of elevating pistons so thatthe cutting blade 25 may engage with the bottom edge of the lowermost piston ring receiving groove. In the event that the piston to be operated upon has had its wrist pin and connecting rod removed, then a wrist pin will be placed upon the reduced threaded extension 32 of the handle 30 after which the handle 31 will be screwed upon the end The handle 31 may now be insert ed. through the apertures in the sides of the piston until the wrist pin is in proper position whereupon the piston may be rotated as before, the wrist pin making a snug fit and preventing bending of the reduced extension of the handle 30.

In order to form the transverse apertures 35 in the beveled edge 33 of the piston ring groove, 1 have provided a finger or segment 36 which is loosely pivoted upon the bolt 8 between the terminal portions 6 and 7 of the annulus; lVhen this finger 36 is in the pof' sition shown in Figs. 1 and 2 its inner longitudinal surface forms a continuation of the opposed inner edges of the annulus. Thuswhen a piston is placed within the annulus the inner longitudinal portions of the finger will lie thereagainst and an oblique bore may be cut in the top of the finger as shown at 37 leading through the longitudinal piston-contracting portion at a point at right angles to the beveled edge 33 of the lowermost piston ring receiving groove. A suitable drillmay be passed through the bore 37 for transversely aperturing the beveled edge of thepiston'in an obvious manner.

lll)

In order to form these apertures in the beveled edge of the piston 'at regular intervals, suitable graduations may be mad: upon the upper edge of the annulus as indicated at 38 iirFig. 2, the numeral 4 there shown upon the upper edge of tl e annulus indicating that an aperture will be forn'ied at each quarter ofthe circumference a .as he bolt is loose in nnnals 6 and 7. V

1,53%,7'69 Y I y I 1 v3 f the beveled edge. The first aperture may i of course be formed at any desired point, after whichthe'pis'ton will be rotated until the aperture thus formed registers with the desired graduation on the circumference of the annulus. The drill may then be inserted again into thebore and another aperreduced in width towards its bolt-receiving end so that when said finger is swung down out of position shown in the drawing the terminal portions of the annulus may be drawn together to a greater extent; How'- ever, when the finger 56 is in the position shown in the figures it will serve" to pre vent the tightening of the annulus to such an extent as to, prevent the rotation of the piston 17 therein.

Should it be: desired, the tool may be manently attached by bolts to awork hench so that the annulus 5 will project from the front edge thereof, a slot being cut in the bench to receive the projection 15. As heretofore stated, the block is preferably integral. However, this block may be-bolte'd or otherwise secured to the strap 12 if dcsired.

Frein the foreging description, read in connection with the accompanying drawin s, it will be readily apparent that my annulus may be clamped in a vise at the front edge of the gripping jaws thereoitlsothat the annulus will project beyond the same thus permitting the annulus to receive a piston with connecting rod attached. Since the transverse bo es; oi the terminals 6 and '7 of the annulus are greater in diameter than the screw 8, there will be no weai" upon the interior portions of said bores and they will not become worn out as would be the case were the member 7 threaded interiorly. Another important advantage of my means for drawing the terminals 6 and 7 of the annulus together, is that by providing the nut 9 countersunk in the outer face of the terminal 7, it is unnecessary that the operator look at the space between the two terminals ormove the piston fin order to determine whether or not the piston is clamped in the annulus. 'l/Vhen t-henut becomes loosened on the screw, its l'ooseness may be :Feltby simply moving the" cap 10,

t the bores of the t'er' of said annulus torn'iing a work support.

Shotild beveling' the lower edges of the upper piston ring-receiving grooves of the piston be found desirable, this may be obviously accomplished by placing thep'iston upper end foremost into the annulus and reversing the block 2% so that it may en gage with the inverted lower edge of one of the upper piston ring receiving grooves.

While I have described and" illustrated the preferred embodiment of my invention, yet it will be understood that I do not pro pose to limit myself strictly thereto, since various changesand modifications thereof will ii'nrn'edi'ately' suggest themselves to those skilled in the art without departing tron r the" spirit of the invention, the scope of which is defined by the" -following claims.

I claim: Y

1. A tool of the character described comprising a work receiving portion for sup; porting rotatable, work, a support for said work receiving portion, and a work reducing and retaining means associated with said support. I i

A tool of the character described coinprising a work-receiving portion; and a combined" work-receiving and retaining means ca'rriecl bysai'd work receiving means.

3. A tool of the character described. coinprisin'gfa contract'ible work-receiving annulus forming a bearing for rotatable work, anarcuate support for said annulus and a portion of said support extend ng" inwardly 4'. A tool 'of the character described com prising a contractib'l'e' work-receiving annulus forming a bearing for rot'atable work, an arcuate support for said annulus having a work supporting portion, anda combined work-reducing and retaining. means associated with" said annulus.

5. A tool of the characterdescribed coin prising a work receiving portion forming a bearing tor rotatable work, ahsupport for said work receiving portion having a" plurality 0t work s'upporting portions, and a work reducingf and retaining means associated with said's'u'pp'ort and means" for progress'ive'ly' moving said work reducing and retaining means against said work.

'6'. A tool of the character described-comprising a" work-receiving portion :tor rotatable work, and a work-reducing and retain ing means carried by said work-receiving means and means for progressively"moving said work reducing and retainin means against said work. I

7. A. tool or the character described comprising a "contractible' work re'ceiji ing'- annulus adapted for receivingrotatable work of various sizes and constituting a bearing therefor, an arcuate support for said annulus having a work sup} Gifting portion, work sively moving'said work reducing and retaining means against said work.

8. A tool of the character describedcom-f prising a work-receiving annulus, a support for said annulus, a portion of said support extending within said annulus, to form a work-support.

9. A tool of thecharacter described comprising a work-receiving annulus, a support for said annulus, a portion of said support extending within said annulus to form awork support and a work-reducing andre-. taining means associated with said annulus.

10. A tool of the character described comprising a contractible work receiving annulus, an arcuate support for said annulus and extending within said annulus to form a work support, a projecting. lug carried by said support adapted for engagement with. a vise, medial enlargement carried upon the upper surface of said support, said enlargement having an annulus receivingand retaining portion. and a work geducing. and retaining element carried by said enlargement.

11. A tool of the character described comprising a contractiblework receiving annulus, an arcuate support for said annulus and extending within said annulus to form a work support, a pro1ect1ng. lug carried by said support adapted for engagement with a vise, medial enlargement carriedupon the upper surface of said support, saidzenlargement having an annulus receiving and retaining portion, and a workireducing and retaining element carried by said enlargement and means for progressively moving said work reducing and retaining means against said work.

12. A tool of the character described comprising a contractible work receiving memher, a support for said work-receiving member, reinforcing meanscarried by said support and engageable with said work receiving member, and work reducing means carried by said reinforcing means.v

13. A tool of the character described. comprising a contractible work receiving. member, a support for said .work receiving a member, reinforcing means carried by said support and engageable with said work receivmg member, and work reducmg and retain'ingmeans carried by said reinforcing I means. a

14. A tool of the character described comprising a contractible work receiving mem her, a support for said work receiving member, reinforcing means carried by said sup port and engageable with said work receiving member, and work reducing means carried by said reinforcing means and means for progressively moving said work reducing means against said work.- I

15. tool of the character described comprising a contractible work receiving annulu's, an arcuatesupport for said annulus,

a work reducing and retaining means associated with said annulus and means for rotating said work in saidwork receiving portion.- a

16. A tool of the character described comprising a contractible work-receiving member having spaced terminal portions, contracting means for drawing said terminal portionstogether, movable means carried by said contracting means between said terminal portions to limit the contractibility of said work receiving member, and a work communicating guide means associated with said movable means. i

17. A tool of. the character described com;

prising a contractible work-receiving mem-' her havin saaced terminal ortions. contracting meansfor drawing said terminal portions together, work reducing means as sociated with said work receiving means,

movablemeans carried by said contracting 1 means between said terminal portions to limit the contractibility of said workreceiv- 1 ing member, and a work communicating guide means associated with said movable means. 1

18. A tool of the characterdescribed comprising a contractible work-receiving member having spaced terminal portions, contracting means for drawing said terminal portions together, a support for said work receiving member and the work, work reducing means carried by said support, movable means carried by said contracting means between said terminal portions to limit the contractibility of said work receiving member, and a work communicating guide means associated with said movable means. s

19. ,A tool of the character described comprising a contractible work receiving memher. having spaced terminal portions, contracting means for drawing said terminal.

portions together, workreducing and retaining means associated with said work receiving means, movable means carried by saidv vcontractlng means between said terminal portions to limit the contractibility of said workreceiving member, and a work communicating guide means associated with saidmovable means.

20. The combination with a contractiblework receiving memberliaving an opening the'rethrough; of a support for said member, reinforcing means carried by said supand having descending Work supporting steps, movable means carried by said contracting means between said terminal portions to limit work receiving member, and work coinmunicating guide means associated with said movable means. v

22. The combination with a contractiblo Work receiving annulus having opposed tea minal portions and contracting means tor said annulus associated with said terminal. portions; of movable finger carried by said contracting means between said terminals for limiting the contractibility of said annulus, said movable finger having a Workcommunicating tool receiving guide associated therewith.

23. The rombination with a contractible Work-receiving member havingan opening therethrough; of a support for said member, said support extending inwardly of said Work receiving member and having descending Work-supporting steps, reinforcing meanscarried by said support and engaging the contractibility of said said member, and Work reducing means carried by said reinforcing means WOIl(I8 ducing means associated with said annulus, and means for moving said Work reducing means to Work engaging position,

The combination With a contractible annulus h'ayingnormally spaced terminals; of a support carried by said annulus and one of its terminals, said support comprisinga metal strap having an arcuate offset intermediate its ends, and means associated with said support for engagement in a vise;

In a "device of the character described, an annulus having normally spaced ter minals, said terminal having aligned transverse bores therethrough, one of said terminals having an angular recess in its outer face, a nut countersunk Within said recess,

a bolt extending through said alined bores and engageable with said nut, and said bolt having a shoulder adjacentone end for engagement With said otherterminal.

In testimony whereof I afiix my signature.

ALBERT S. HAISLIP. 

